Allan edmondson



(No Mbdel.)

A. EDMONDSON, J. B. MOORHOUSE & T. A. PROCTER.

Y HINGE FOR STEP LADDERS.

No. 357,188. Patented Feb. 8,.1887.

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Attorneys I UNITED STATES P TE T OFFICE.

ALLAN EDMONDSON, JOHN BENJAMIN MOORHOUSE, AND THOMAS ABRAHAM PROCTER, OF SKIPTON-IN-ORAVEN, COUNTY OF YORK, ENGLAND.

HINGE FOR STEP-LADDERS.

SPECIFICATION forming part of Letters Patent No. 357,188, dated February 8, 1887. Application filed'Sepiember E0, 1886. Serial No. 214,100. (No model.) Patented in Eng and Juiy 10, 1885, No. 8,339.

T 0 all whom it may concern:

Be it known that we, ALLAN EDMo DsoN, JOHN BENJAMIN MOORHOUSE, and THOMAS ABRAHAM PROCTER, subject-s ofithe Queen of Great Britain, all residing at Skipton-in Ora-.

sition for being used, is to firmly hold them so, thus preventing any accidents incident to the slipping or moving too far outwardly or inwardly from or to the said step-ladders of their supports, as has often been found to happen heretofore. This object is attained by the device illustrated in the accompanying drawings, in which- Figures 1 and 2 are side views of the hinge closed and opened, respectively, Fig. 3 being a plan of Fig. while Fig. 4 is a perspective rawing of a step-ladder and hinge, in each case with our improved appliance attached.

Like letters of reference indicate like parts in all the drawings.

The parts a I), hinged together at c, constitute the hinge commonly in use, and, accord ing to our invention, to the part a we hinge the link d by means of the buttou'headed pin 6. In the said link (I we form a slot, f, the

outer end of which terminates in the notch 9. Of course it will be easily seen that the notch 9 may be formed either at the end, as shown, or at any distance therefrom, or even be sup plemented by several other notches along the upper edge of the said slot f.

To the part b we attach the button-headed pin it, the shank part of which passes through the slot f, which allows the parts a and b to open and close by allowing the pin it to pass along it, andwith the link cl laying hold of the pin it by its notch y when the said parts a and b are apart, as shown by Figs. 2 and 4, the object desired is accomplished. When the said parts a and b are required to be closed, by simply lifting the link (I with its notch g clear of the shank of the pin it they are at liberty so. to be.

Having now described the nature of our invention, what we claim is 1. In combination with a step-ladder hinge, a slotted and notched link pivoted to one of the elongated portions of said hinge, in order to operate, substantially as herein specified.

,2. In combination with a step-ladder hinge, a slotted and notched link hinged thereto, operating with a pin attached to the said hinge in the manner and for the purposes specified.

ALLAN EDMONDSON. JOHN "BENJAMIN MOORHOUSE. THOMAS ABRAHAM PROCTER.

Witnesses:

' Bo. B. NIOHOLLS,

SAMUEL HEY. 

